Communication Options; Hart Protocol Interface Option; Using A 268/275/375 Rosemount Communicator Or Equal; Honeywell De Protocol - K-TEK AccuTrak AT100 Installation & Operation Manual

5.0 COMMUNICATION OPTIONS

5.1 HART Protocol Interface Option

The K-TEK transmitter can be ordered with the HART Protocol Option, which is installed at the factory as a
part of the electronic module assembly.
communicate with the transmitter using a Rosemount 268, 275, or 375 communicator utilizing slave mode. HART
communications will allow access to certain functions. This communication will not interfere in the operation of the
transmitter. If the AT100 is to be used in a Safety Implemented System, HART communications can only be used to
configure or proof test the transmitter.

5.1.1 Using a 268/275/375 Rosemount Communicator or Equal

Since the K-TEK transmitter is not a known ROSEMOUNT product, these handheld devices will
communicate in the GENERIC mode. This mode allows access to the commands listed here:

READ OR WRITE OUTPUT UPPER RANGE & LOWER RANGE VALUES

READ OR WRITE OUTPUT DAMPING VALUE

READ OR WRITE TRANSMITTER TAG, DESCRIPTION, MSG, DATE

PERFORM OUTPUT DIGITAL TRIM (DAC TRIM)

TEST LOOP OUTPUT

SET POLLING ADDRESS
Changes to transmitter settings via HART communication must be verified by cycling power to the transmitter,
reestablishing communications, and reading the values.
NOTE: If a transmitter is in an alarm condition (20.97 or 3.61 mA) or does not have a float present on the sensor tube, the
handheld communicator will respond as if the transmitter had a hardware failure. If there is a float present, proceed with
troubleshooting in Section 6.

5.2 Honeywell DE Protocol

5.2.1 Interoperability and Conformance Class

The Honeywell DE Protocol option uses the Honeywell proprietary Digitally Enhanced Protocol for Smart
Transmitters.
The conformance class support is as follows:
The DCS configuration should be set for Class 0, 4 byte Mode.
Class 0: Continuous broadcast, in burst mode, of the following parameters:
The Transmitter settings should be as follows:

5.2.2 Operating Modes

The K-TEK transmitter with the Honeywell DE Protocol option can be operated in two ways which can be
selected using the setup menu on the instrument. (See section 3.2.2 Calibration using the LCD Setup Menu.)

DE Digital Mode: In this mode the transmitter output is strictly digital and uses the Honeywell DE
Protocol which modulates the loop current ON and OFF to transmit digital information per above Class
Performance definition.

Analog Output Mode: Selecting the Analog Output Mode disables the Honeywell DE Digital Output and
places the transmitter in a standard 4-20mA Output mode. In this mode, no digital communications are
available.
AT100-0200-1 Rev L (10-2010) DCN0528
When fitted with the HART Protocol Option, it will be possible to
PV1: Primary Variable; Level #1 in %
PV2: Secondary Variable; Level #2 in % (if equipped)
PV status: Ok, Critical or Bad PV
DE = ON
NPV (Number of Process Variables) = 1 or 2
DB = OFF
15